Resistance to citrus canker induced by a variant of Xanthomonas citri ssp. citri is associated with a hypersensitive cell death response involving autophagy-associated vacuolar processes
- Roeschlin, Roxana Andrea
- Favaro, María Alejandra
- Chiesa, Maria Amalia
- Alemano, Sergio Gabriel
- Vojnov, Adrián Alberto
- Castagnaro, Atilio Pedro
- Filippone, María Paula
- Gmitter, Frederick G.
- Gadea, José
- Marano, María Rosa
DOIAbstract
Xanthomonas citri ssp. citri (X. citri) is the causal agent of Asiatic citrus canker, a disease that seriously affects most commercially important Citrus species worldwide. We have identified previously a natural variant, X. citri AT, that triggers a host-specific defence response in Citrus limon. However, the mechanisms involved in this canker disease resistance are unknown. In this work, the defence response induced by X. citri AT was assessed by transcriptomic, physiological and ultrastructural analyses, and the effects on bacterial biofilm formation were monitored in parallel. We show that X. citri AT triggers a hypersensitive response associated with the interference of biofilm development and arrest of bacterial growth in C. limon. Th...
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